TEMPERATURE COMPENSATED ORIENTATION OF BERLINITE FOR SURFACE ACOUSTIC WAVE DEVICES

摘要

TEMPERATURE COMPENSATED ORIENTATION OF BERLINITE FOR SURFACE ACOUSTIC WAVE DEVICES A piezoelectric wafer of single crystal berlinite, having a surface defined by an X axis boule cut at about 85.degree., provides an improved substrate for a surface acoustic wave device. The 85.degree. cut angle is relatively easy to fabricate, provides excellent temperature compensation in a range from 20.degree.C to 100.degree.C, and has high piezoelectric coupling coefficient.